211964476816 has 15 divisors (see below), whose sum is σ = 410684741931. Its totient is φ = 105981317616.

The previous prime is 211964476799. The next prime is 211964476847. The reversal of 211964476816 is 618674469112.

The square root of 211964476816 is 460396.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1784035 + ... + 1899133.

Almost surely, 2^211964476816 is an apocalyptic number.

211964476816 is the 460396-th square number.

It is an amenable number.

211964476816 is a deficient number, since it is larger than the sum of its proper divisors (198720265115).

211964476816 is an frugal number, since it uses more digits than its factorization.

211964476816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230206 (or 115101 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 211964476816 in words is "two hundred eleven billion, nine hundred sixty-four million, four hundred seventy-six thousand, eight hundred sixteen".